Now, the range of values for t, well, we are going counterclockwise around the entire circle so that should go from zero to 2pi.

这就变成了关于t的积分，这是一个逆时针旋转的整圆,那么t就是从0到2π

youdao

T: Well, I'll do my best, but I don't think we can change it.

好吧，我尽力，但是我觉得改变不了了。

youdao

T: Well, I'll do my best, but I don't think we can change it.

好吧，我尽力，但是我觉得改变不了了。

youdao